To connect https //plex.tv/link to TV simply means to permit you Smart TV to have access to all your content stored in the Plex server. For this to happen, you need to first download the application. After downloading the app the next step is to sign in and get an activation code.
Linking Multiple Devices to Plex Television Account
Plex application allows you to connect or link 15 devices to the help of your Plex account. To be able to access the media using in the Plex application, you have to connect each device to Your Plex account. You are not able to connect greater than fifteen devices on your account. You can, however, remove an old device and link another device into the account. plex.tv/link account.